Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 5. Отображено 5.
25-10-2019 дата публикации

3D printer scraper device

Номер: CN0209534172U
Автор: CHEN YONGQIN, JI YANYU, LIN ZICHENG, XIAO JINBAO, CHEN XUEPING
Принадлежит: XIAMEN XINGSHENGZHE IND AND TRADE CO LTD, XIAMEN XINGSHENGZHE INDUSTRY AND TRADE CO., LTD.

The utility model discloses a scraper device of a 3D printer, which is characterized in that a front-back moving mechanism is arranged above a bracket, an up-down moving mechanism is connected with the front-back moving mechanism, and a scraper mechanism is arranged below the up-down moving mechanism; the first scraper and the second scraper are arranged below the up-down moving mechanism in parallel; the two ends of the first scraper are bent outwards, a filter screen is arranged in the middle of the first scraper, the bottom of the first scraper is perpendicular to the horizontal plane, a first blade made of a flexible material is arranged at the bottom of the first scraper, the thickness of the second scraper is 10 mm, and a second blade made of a tungsten steel material is arranged atthe bottom of the second scraper. The first scraper and the second scraper act in sequence, the printing quality is improved, the first scraper or the second scraper is directly detached and directlyreplaced ...

Подробнее
Номер записи: 1
01-12-2017 дата публикации

Calculation method for sliding velocity of coarse particles in pump

Номер: CN0107423473A
Автор: TAN MINGGAO, JI YANYU, LIU HOULIN, WU XIANFANG, WANG KAI, WANG YONG, DONG LIANG
Принадлежит:

The invention discloses a calculation method for a sliding velocity of coarse particles in a pump. According to the process, an HSV (high-speed photography) method is adopted to obtain position images in a chronological order when the coarse particles pass through the pump; MATLAB is adopted to compile a C language program for high-speed photography image processing of two-phase flow of the coarse particles, and a transient relative velocity of the coarse particles in the pump is calculated; a three-dimensional fluid domain of the pump is modeled through three-dimensional modeling software Creo, UG or Solidworks; meshing is performed on the fluid computational domain through meshing software; Fluent is adopted to perform numerical calculation on flowing of clear water in the pump; CFD-Post is utilized to read a relative velocity of a mass point of liquid flow at the position of the coarse particles; and according to a definition of the particle sliding velocity, a particle sliding velocity ...

Подробнее
Номер записи: 2
25-07-2023 дата публикации

Rocket control signal correction algorithm based on BP neural network

Номер: CN116477070A
Автор: ZHANG ZHIPING, XIU GUAN, KUANG DONGZHENG, JI YANYU, MAO CHENGYUAN
Принадлежит:

The invention discloses a rocket control signal correction algorithm based on a BP (Back Propagation) neural network, which is used for amplitude and phase correction of a control system signal, belongs to the field of carrier rocket control, and comprises the following steps of: 1, giving expected correction amplitude and correction phase characteristics within a frequency range considered by a control signal according to rocket body characteristics; 2, generating a BP neural network time domain signal training sample sequence containing a constant value and multiple frequency components according to expected amplitude phase characteristics; 3, designing a BP neural network with a proper scale; 4, training the BP neural network by adopting a sample until a better convergence effect is achieved; and step five, amplitude phase characteristic identification is carried out on the trained BP network, and the effect is verified. According to the method, the principle is simple, the defect that ...

Подробнее
Номер записи: 3
08-03-2017 дата публикации

Economize on electricity energy storage type emergency power source

Номер: CN0206004401U
Автор: JI YANYU, HU XIJIN
Принадлежит: TIANJIN WEIHAN ELECTRIC CO LTD, TIANJIN WEIHAN ELECTRIC CO., LTD.

Economize on electricity energy storage type emergency power source. The utility model relates to an economize on electricity energy storage type emergency power source. Along with the development of society, the building technology horizontally constantly improves, and the building in city trends towards on a large scale, the development of high stratification. Thereupon, require the modernized building that makes of increasingly high, social informationization, building also increasing to the reliance of supplying power to the power supply of constructing, especially some important public building in case the interrupt is supplied power, will cause great politics influence or economic loss, if the emergence conflagration, the consequence is just more hardly imaginable. Change over switch accept the electric current of electric wire netting, change over switch with the electric current transmit for isolation transformer with the load, isolation transformer with the load parallelly connected ...

Подробнее
Номер записи: 4
02-05-2023 дата публикации

Self-balancing discharging device for engine propellant and design method of self-balancing discharging device

Номер: CN116044609A
Автор: ZHANG ZHONG, ZHAO JUNQI, JI YANYU, YU ZEYOU, MA CHENXI, ZHANG CHENG
Принадлежит:

The invention provides a simple and efficient engine propellant self-balancing discharging device and a design method thereof on the basis of the requirement for reducing propellant discharging interference of a pump system before restarting of a liquid rocket engine, and the simple and efficient engine propellant self-balancing discharging device comprises a discharging pipe structure form, a discharging pipe structure form and a discharging pipe structure form, according to the installation layout design principle of the discharge pipe, it is required that no or less shielding objects exist in the 120-degree taper angle range of an outlet of the discharge pipe, and the direction of the discharge outlet is perpendicular to the plane where the discharge pipe and the axis of the rocket body are located; according to different numbers of configured engines, different included angles are formed between a plane formed by the outlet axis of the discharge pipe and the longitudinal axis of the ...

Подробнее
Номер записи: 5